package com.xls.springboot.controller;

import com.xls.springboot.dao.StudentRepository;
import com.xls.springboot.entities.Project;
import com.xls.springboot.entities.Student;
import com.xls.springboot.services.StudentService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.Errors;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;

import javax.validation.Valid;
import java.util.List;

@Controller
@RequestMapping("/students")
public class StudentController {
    @Autowired
    StudentService studentService;
    @Autowired
    StudentRepository studentRepository;
    @GetMapping
    public String displayStudents(Model model){
        List<Student> students=studentService.getAll();
        model.addAttribute("student",students);

        return "students/list-students";
    }
    @GetMapping("/new")
    public String displayStudentForm(Model model){
        Student aStudent=new Student();
model.addAttribute("student",aStudent);
        return "students/new-student";
    }

    @PostMapping("/save")
    public String creatStudent(Model model,@Valid  Student student,Errors errors){
        if (errors.hasErrors()) return "students/new-student";
//        使用student crudRepository保存到数据库
studentService.save(student);


        return "redirect:/students";
    }
    @GetMapping("/update")
    public String  displayStudentUpdateForm(@RequestParam("id") long theId,Model model){
        Student theStudent=studentService.findByStudentId(theId);
model.addAttribute("student",theStudent);

        return "students/new-student";
    }
    @GetMapping("/delete")
    public  String deleteStudent(@RequestParam("id") long theId,Model model){

        Student theStudent = studentService.findByStudentId(theId);
        studentService.delete(theStudent);
        return "redirect:/students";
    }

}
